THE BONES OF THE UPPER LIMB 



i8i 



where it forms, with the external border of the spine, the great 

 scapular notch. In this latter situation there are numerous fora- 

 mina for branches of the suprascapular artery. 



The spine is situated on the dorsum of the bone, which it crosses in 

 a direction outwards and slightly upwards. It commences at the 

 \ertebrcd border in a flat triangiilar surface, over which the tendon 

 receiving the lower fibres of the trapezius glides, with the interven- 

 tion of a bursa. It soon becomes very prominent, and at its outer 



Suprascapular Coracoid 

 Posterior Belly of Omo-hyoid Notch Process Trapezius 



Supraspiuons Fossa and Supraspinatus \ i 



Superior Angle I ', J 



Levator Anguli Scapulas 



Spine 



For Tendon 



of Trapezius 



Rhomboideus Minor 



Rbomboideus Major. 

 Infraspinous Fosia 

 and Infraspinatus 



Groove for Dorsalis 

 Scapube Artery 



.Acromion 

 Process 



Deltoid 



Great 

 Scapular Notch 

 Glenoid Cavity 



Infraglenoid Ridge 



and Long Head 



of Triceps 



--« Axillary Bofder 

 > Teres Minor 



», Ttres Major 



""•*•. Inferior Angle 

 Latissimus Dorsi 



Fig. I02. — The Right Scapula (Posterior View). 



extremity it undergoes a slight twist and forms the acromion process. 

 It is triangular, and compressed from above downwards. The 

 superior surface forms part of the supraspinous fossa, and gives origin 

 to fibres of the supraspinatus, whilst the inferior surface forms part of 

 the infraspinous fossa, and gives origin to fibres of the infraspinatus. 

 The external border, which is short, boimds internally the great 

 scapular notch. The anterior border is continuous \y\ih the body 

 of the bone. The posterior border or crest presents an upper lip, which 

 gives insertion to part of the trapezius, a lower lip, giving partial 



